执行随机方法 [英] Executing a random method

问题描述

我正在尝试为执行随机方法制定逻辑.例如，假设我有10种方法，我需要随机运行其中一种方法.

I am trying to make a logic for executing a random method. Let's say for example I have 10 methods, I need to run one of them selected at random.

主要方法将驻留在我的Rails 3.2应用程序的ActionController中，其中将包含逻辑和10个方法.

The main method will reside in the ActionController of my Rails 3.2 app which will have the logic and the 10 methods inside.

推荐答案

使用 send :

# Make a few methods
def a; 1; end
def b; 2; end
def c; 3; end
def d; 4; end
def e; 5; end

# Put their names in an array
methods = %i[a b c d e]

# Call a random one
send methods.sample  #=> 4
send methods.sample  #=> 1
send methods.sample  #=> 3

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